Suddenly Blender 3.5 is not smooth

[PaZi]

Good evening. 

I have workflow dragging, delay, highlight invisibility problems. 
For example, if I move the mouse, the workspace flickers. Or, I click to change from Object Mode to Edit Mode, nothing happens, until I move the mouse, then suddenly the drop-down-menu shows. The next example is: I choose the area for Unwrap, right-click, nothing happens, until - again - I move the mouse. And, the highlights don't correspond where the mouse is. I have to move it for the highlight being on the correct positions. And everything seem to drag for miliseconds.
It all happened rather suddenly. 2 weeks before, it was fun and smooth. Since this week, not so much. I had reinstalled Blender and the answers from the search machines are not accurate.

Maybe this discomfort is known. If not, I shall download a recording software, since XBox recording is too unreliable.

My specs:

Prozessor Intel® Core™ i7-6500U CPU @ 2.50GHz  2.60 GHz
Installierter RAM 16.0 GB
Systemtyp 64-Bit-Betriebssystem, x64-basierter Prozessor

Edition Windows 10 Home
Version 22H2
Installiert am ‎06/‎11/‎2020
Betriebssystembuild 19045.3031
Leistung Windows Feature Experience Pack 1000.19041.1000.0


Best regards

[Faba]

Does it happen only with a heavy scene, or even with just a cube?

If it happened "suddenly" without any other change or software update
I would update my graphic card drivers.

[PaZi]

Hi Faba.

In Blender Stack Exchange, someone sent me to the right direction. It was indeed the graphic card driver. It must have lost my attention while an actual one was ready to be updated. Thanks.